Indoor positioning system and positioning method based on Bluetooth location fingerprint

An indoor positioning and positioning system technology, which is applied to location information-based services, electrical components, wireless communications, etc., to improve positioning accuracy and reduce workload

Active Publication Date: 2015-12-16
济南东朔微电子有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention solves the influence of the environment change on the indoor positioning in the traditional positioning method, and improves the positioning accuracy

Method used

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  • Indoor positioning system and positioning method based on Bluetooth location fingerprint
  • Indoor positioning system and positioning method based on Bluetooth location fingerprint
  • Indoor positioning system and positioning method based on Bluetooth location fingerprint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An indoor positioning system based on Bluetooth location fingerprints, including a Bluetooth mobile device, a Bluetooth anchor node and a data server;

[0043]The Bluetooth mobile device communicates with the Bluetooth anchor node: sending the Bluetooth parameter packet of the Bluetooth mobile device to the Bluetooth anchor node, and receiving the position information returned by the Bluetooth anchor node; the Bluetooth mobile device is such as a mobile phone, a tablet Computers, etc., set the Bluetooth to be searchable; users can freely define the name of the Bluetooth device, and finally it can be displayed on the positioning program interface;

[0044] The Bluetooth anchor node sends the Bluetooth parameter data packet of the Bluetooth mobile device to the data server through the Bluetooth routing node, and finally sends the location information processed by the data server back to the Bluetooth mobile device through the Bluetooth anchor node of the one-to-many connec...

Embodiment 2

[0048] A method for positioning using a positioning system as described in Embodiment 1 is based on an indoor positioning method based on bluetooth position fingerprints, comprising the following steps:

[0049] 1) Building a database offline:

[0050] The bluetooth anchor node is a reference point, and the reference point receives the bluetooth parameter data packet of the bluetooth mobile device, and establishes a spatial spectrum database, and the bluetooth parameter data packet includes RSSI, autocorrelation function, power spectral density of bluetooth signal, channel Status information CSI, link quality value LQ, humidity and population density information;

[0051] The autocorrelation function describes the correlation degree of a random process taking values ​​at two different moments separated by t time;

[0052] The power spectral density of the bluetooth signal is obtained by Fourier transform of the result calculated by the autocorrelation function;

[0053] Usin...

Embodiment 3

[0070] As in the indoor positioning method described in Embodiment 2, the specific steps for estimating the given location information are as follows:

[0071] First, calculate the distance between the collection point fingerprint and the reference point fingerprint in the spatial spectrum fingerprint database: assuming that there are m reference point fingerprint data in the spatial spectrum fingerprint database, the collected fingerprint data contains n fingerprints from different Bluetooth anchor nodes, each The fingerprint data is denoted as s j , j=1...n, select the Bluetooth anchor node corresponding to the maximum value in the fingerprint data as the target anchor node s k , m reference point fingerprint data corresponding to n bluetooth anchor node fingerprints denoted as s ij , i=1...m, j=1...n, select the reference point fingerprint s to receive the signal of the target Bluetooth anchor node lk , for each reference point, the distance L between the collected point ...

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Abstract

The present invention discloses an indoor positioning system and positioning method based on a Bluetooth location fingerprint. The indoor positioning system comprises a Bluetooth mobile device, a Bluetooth anchor node and a data server; the indoor positioning system makes the best of high dimensional spatial spectrum information related to channel information and environmental information followed by extracting a robust spatial spectrum fingerprint by means of principal component analysis, so that the more stable fingerprint means that the fingerprint data reliability in a fingerprint database can be improved; the effect against indoor multipath interference can be enhanced when match positioning is carried out; and the positioning precision can be promoted. In an indoor multipath environment, the fingerprint has a better effect against the multipath interference, and the random variable is more stable in a statistical sense.

Description

technical field [0001] The invention relates to an indoor positioning system and a positioning method based on Bluetooth position fingerprints, belonging to the technical field of positioning. Background technique [0002] In recent years, with the rapid development of the economy, more and more large-scale buildings and underground shopping malls have been constructed in large and medium-sized cities. People spend most of their time living and working in indoor environments such as buildings, shopping malls, and restaurants. High-precision indoor positioning technology can effectively improve work efficiency and quality of life, and the demand for indoor positioning services is increasing. As a short-distance wireless communication technology, Bluetooth is mature, cheap, and cost-effective, and has become a standard configuration on mobile devices. Among many indoor positioning technologies, the indoor positioning technology based on location fingerprint can achieve relati...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W64/00
CPCH04W4/023H04W64/00
Inventor 阎跃鹏齐晓光张浩杜占坤车玉洁
Owner 济南东朔微电子有限公司
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